What is the sales tax for 98611 Castle Rock, Washington? - The sales tax for 98611 Castle Rock, Washington is 7.9% as of 2026. 7.9% is the combine sales tax from 6.5% of Washington state sales tax, 1.4% of local sales tax, and 0% of Cowlitz county sales tax.
| Zip Code | 98611 | ||
|---|---|---|---|
| State | Washington | State Tax | 6.5% |
| City | Castle Rock | City Tax | 1.4% |
| County | Cowlitz | County Tax | 0% |
| Special Tax | 0% | ||
| Total Sales Tax | 7.9% | ||
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